Port isolator



FIG. 1 is a isometric view of a port isolator showing a new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a bottom side elevational view thereof. 

The ornamental design for a port isolator, as shown and described. 